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Automobile soundproof material and preparing method thereof

A technology for sound insulation materials and automobiles, which is applied in the field of sound insulation materials for automobiles. It can solve problems such as poor interface bonding, increased material weight, and insufficient compactness, and achieve the effects of less filler addition, good sound insulation effect, and light weight

Inactive Publication Date: 2016-07-06
LIUZHOU SHENTONG AUTOMOBILE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of the automobile industry, the requirements for sound insulation performance, heat resistance and mechanical properties of sound insulation materials are getting higher and higher, and it is becoming more and more difficult for previous materials to meet the requirements
[0003] The combination of various thermoplastic resin molecules in the sound insulation layer of the traditional formula automobile sound insulation material is not tight enough, and the interface between the thermoplastic resin and the filler is poorly bonded, not dense enough, and it is difficult to achieve the ideal sound insulation effect, and due to the addition of a large amount of inorganic fillers , which increases the weight of materials, which deviates from the trend of lightweight vehicles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Use 1 part of aminopropyltriethoxysilane to surface treat 3 parts of nano-silica according to the mass fraction, wherein the particle size of nano-silica is 40nm, and the specific surface area is 150m 2 / g; then add 90 parts of ethylene-vinyl acetate copolymer, 1 part of stearyl peroxide and 0.5 part of 2,6-tertiary butyl-4-methylphenol, and mix well; then use a screw extruder Carry out extrusion and granulation, and the working temperature of the extruder is kept at 80°C; then, the above-mentioned pellets are placed on a vulcanizing machine with a mold to make a diaphragm; Under the condition of vacuum hot pressing for 25min, a 2mm thick sound insulation sheet is made. After testing, the density of the sheet is 1630kg / m 3 , when the frequency is 100, 500, 1000, 3000, 5000Hz, the sound insulation is 14, 29.5, 35.3, 42, 48.3dB respectively.

Embodiment 2

[0029] Use 2 parts of vinyltriethoxysilane to surface treat 6 parts of nano-silica according to the mass fraction, wherein the particle size of nano-silica is 60nm, and the specific surface area is 180m 2 / g; then add 95 parts of ethylene-vinyl acetate copolymer, 1 part of p-chlorobenzoyl peroxide and 0.5 part of 2,6-tertiary butyl-4-methylphenol, and mix well; then use a screw The extruder is extruded and granulated, and the working temperature of the extruder is kept at 90°C; then the above-mentioned pellets are placed on a vulcanizer with a mold to make a diaphragm; finally, the diaphragm is made at a temperature of 140°C and a vacuum of - Under the condition of 0.1MPa, vacuum heat press for 20min to make a 2mm thick sound insulation sheet. After testing, the density of the sheet is 1750kg / m 3 , when the frequency is 100, 500, 1000, 3000, 5000Hz, the sound insulation is 14.5, 31.6, 38.7, 45, 49.2dB respectively.

Embodiment 3

[0031] Surface treatment of 10 parts of nano-silica with 2 parts of ethylenediaminepropylmethyldimethoxysilane according to mass fraction, wherein the particle size of nano-silica is 80nm, and the specific surface area is 200m 2 / g; then add 100 parts of ethylene-vinyl acetate copolymer, 2 parts of dicumyl peroxide and 1 part of 2,6-tertiary butyl-4-methylphenol, and mix well; then extrude with a screw The extruder is extruded and granulated, and the working temperature of the extruder is kept at 100°C; then the above-mentioned pellets are placed on a vulcanizing machine with a mold to make a diaphragm; finally, the diaphragm is made at a temperature of 150°C and a vacuum of -0.1MPa Under the conditions of vacuum hot pressing for 15 minutes, a 2mm thick sound insulation sheet is made. After testing, the density of the sheet is 1680kg / m 3 , when the frequency is 100, 500, 1000, 3000, 5000Hz, the sound insulation is 14.2, 29.8, 36.2, 42.8, 48.8dB respectively.

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Abstract

The invention relates to an automobile soundproof material, in particular to an automobile soundproof material and a preparing method thereof. The soundproof material is prepared from 90-100 parts of ethylene vinyl acetate copolymers, 3-10 parts of nanosilicon dioxide, 1-2 parts of coupling agent, 1-2 parts of cross-linking agent and 0.5-1 part of antioxidant. According to the soundproof materials, as the ethylene vinyl acetate copolymers are adopted, and the nanosilicon dioxide servers as filler, the amount of added filler is small, and the prepared material is good in soundproof effect; meanwhile, the soundproof sheet prepared with the preparing method is small in density and small in weight, and conforms to the lightweight trend of automobiles.

Description

technical field [0001] The present invention relates to soundproof materials for automobiles. Background technique [0002] With the progress of mankind and the development of science, noise pollution has become a problem that cannot be ignored. Absorbing noise and reducing noise pollution are important issues related to the coordinated development of human society. With the deepening of research, various materials for absorbing sound waves are produced. The principle of sound insulation is to use when the sound wave passes through a certain object, the object can absorb, reflect and weaken, so as to block the sound wave from continuing to propagate, so as to achieve the effect of sound insulation. With the development of the automobile industry, the requirements for sound insulation performance, heat resistance, and mechanical properties of sound insulation materials are getting higher and higher, and it is becoming more and more difficult for conventional materials to me...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08K9/06C08K3/36B29C47/92B29C51/46B29C48/92
CPCC08K9/06B29C48/92B29C51/46B29C2948/92704C08K3/36C08K2201/003C08K2201/006C08K2201/011C08L23/0853
Inventor 钟静清韦晗
Owner LIUZHOU SHENTONG AUTOMOBILE TECH CO LTD
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